Which selective pesticide would you use to manage weeds without harming grass?

The correct choice, herbicide, is specifically designed to target and control unwanted plants or weeds while being selective enough to minimize damage to desirable plants, such as grass. Selective herbicides contain active ingredients that can distinguish between various types of plant species. This means they can effectively kill or inhibit the growth of certain weeds while allowing grass and other desirable plants to thrive.

In contrast, insecticides are aimed at controlling insect populations and would not be effective in managing weeds. Fungicides are used to combat fungal diseases affecting plants but do not play a role in weed management. Rodenticides are formulated to target rodent pests, which makes them irrelevant when considering weed control in grass areas. Therefore, using a selective herbicide is the appropriate approach for managing weeds without harming grass.